BOSS is a brand name of the Roland Corporation, a Japanese manufacturer of musical equipment founded in 1972. In the U.S., Roland is headquartered in Los Angeles, California.
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Boss’ free tuner app looks just like the TU-3, but don’t throw away your pedal yet .
Boss’ entry-level clip-on is a high-quality, rugged, no-frills tuner, with respectable ±1.0 cent detection accuracy.
The TU-10 offers some nice features in this sturdy clip-on tuner, including calibration and transposition capabilities, along with Boss’ popular “Accu-Pitch” feature.
For those looking for a well-made, compact handheld tuner with an analog needle gauge, Boss’ TU-12EX is a solid, if rather pricey, choice.
The legendary Boss TU-2 is the first great pedal guitar tuner — an almost indestructible piece of engineering matched with the Boss’s fabled buffer circuit. And while its ±3.0 cent accuracy represented the state-of-the-art in 1998, you’ll probably want a more accurate tuner.
The TU-3 offers improved detection accuracy over the TU-2 (±-1.0 cent vs. ±3.0 cents), a higher-resolution display, high-brightness mode, and additional transposition and calibration options. Form, materials and build quality are exactly the same.
The TU-30 is Boss’ compact successor to the popular (and discontinued) TU-80, offering solid specs and numerous features including a built-in mic, metronome and beeping “Accu-Pitch” function. It lacks, however, an output jack.
The compact Boss TU-3s offers the same specs (and some of the same functionality) as the full-sized TU-3 in a compact, always-on version, but the lack of mute functionality may be a deal-killer for some.